| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-47704: drm/amd/display: Check link_res->hpo_dp_link_enc before using it |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/amd/display: Check link_res->hpo_dp_link_enc before using it |
| |
| [WHAT & HOW] |
| Functions dp_enable_link_phy and dp_disable_link_phy can pass link_res |
| without initializing hpo_dp_link_enc and it is necessary to check for |
| null before dereferencing. |
| |
| This fixes 2 FORWARD_NULL issues reported by Coverity. |
| |
| The Linux kernel CVE team has assigned CVE-2024-47704 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.6.55 with commit be2ca7a2c1561390d28bf2f92654d819659ba510 |
| Fixed in 6.10.14 with commit 530e29452b955c30cf2102fa4d07420dc6e0c953 |
| Fixed in 6.11.2 with commit 0508a4e95ac1aefd851ceb97ea050d8abb93262c |
| Fixed in 6.12 with commit 0beca868cde8742240cd0038141c30482d2b7eb8 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-47704 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/gpu/drm/amd/display/dc/link/hwss/link_hwss_hpo_dp.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/be2ca7a2c1561390d28bf2f92654d819659ba510 |
| https://git.kernel.org/stable/c/530e29452b955c30cf2102fa4d07420dc6e0c953 |
| https://git.kernel.org/stable/c/0508a4e95ac1aefd851ceb97ea050d8abb93262c |
| https://git.kernel.org/stable/c/0beca868cde8742240cd0038141c30482d2b7eb8 |
